	
	package servlet.grade;
	
	import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

	import javax.servlet.ServletException;
	import javax.servlet.http.HttpServlet;
	import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import service.GradeManagner;

import enitys.Grade;
	
	public class GradeAllInfo extends HttpServlet {
	
		/**
		 * 
		 */
		private static final long serialVersionUID = 1L;

		/**
		 * Constructor of the object.
		 */
		public GradeAllInfo() {
			super();
		}
	
		/**
		 * The doGet method of the servlet. <br>
		 *
		 * This method is called when a form has its tag value method equals to get.
		 * 
		 * @param request the request send by the client to the server
		 * @param response the response send by the server to the client
		 * @throws ServletException if an error occurred
		 * @throws IOException if an error occurred
		 */
		public void doGet(HttpServletRequest request, HttpServletResponse response)
				throws ServletException, IOException {
				doPost(request,response);
		}
	
		/**
		 * The doPost method of the servlet. <br>
		 *
		 * This method is called when a form has its tag value method equals to post.
		 * 
		 * @param request the request send by the client to the server
		 * @param response the response send by the server to the client
		 * @throws ServletException if an error occurred
		 * @throws IOException if an error occurred
		 */
		public void doPost(HttpServletRequest request, HttpServletResponse response)
				throws ServletException, IOException {
					List<Grade> list=new ArrayList<Grade>();
					try {
						list=GradeManagner.getInstance().Allinfo();
						if(list.isEmpty()){
							request.setAttribute("message", "没有成绩信息！");
						}else{
							request.setAttribute("message", "成绩信息如下：");
						}
						request.setAttribute("grade",list);
						request.getRequestDispatcher("/jsp/grade/admin_grade.jsp").forward(request, response);
					} catch (Exception e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
			
		}

	
	}
